Smokeless combustion-furnace.



. N0. 7|],805. Patented Oct. 2|, I902.

Y C. WEGENER.

SMOKELESS CDMBUSTIONFURNACE.

(Application filed Oct. 17. 1900.)

(No Model.) 2 Sheets-Sheet I.

No. 7||,s05. Patented Oct. 2|, I902. C. WEGENER.

SMOKELESS COMBUSTION FURNACE.

(Application filed Oct. 173 1900.)

(No Model.) 2 Sheets-Sheet 2.

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UNITED STATES PATENT OFFICE.

CARL WVEGENER, OF BERLIN, GERMANY.

SMOKELESS COMBUSTION-FURNACE.

SPECIFICATION forming part of Letters Patent No; 71 1,805, dated October21, 1902.

Application filed October 17, 1900. Serial No. 33,389. (No model.)

To all whom, it nuty concern:

Be it known that I, CARL WEGENER, a subject of the King of Prussia,Emperor of Germany, residing at Nos. 14 and 15 Gitschinerstrasse,Berlin,Prussia,German Empire, have invented new and useful Improvements in andin Connection with Smokeless Combustion-Furnaces, of which the followingis a specification. 1

My invention relates to improvements in and connected with that class offurnaces in which the fuel is fed from underneath'below an upperlayer ofburning fuel. In this class of furnaces the heating-gases are generatedby a perfectly-smokeless combustion as the fresh fuel introducedunderneath that al ready burning is subjected to a preliminary heatingfrom above, so that its products of distillation are completely oxidizedas they pass through the burning layer.

The object of my invention is to secure by the general arrangement ofthe furnace and by the way of supplying the air of combustion to thedifierent zones of the burning fuel a better combustion and a betterutilization of the calorific value of the fuel.

In the accompanying drawings I have shown how my said invention may beconveniently and advantageously carried into practice.

Figure 1 is a side elevation, partly in section, and Fig. 2 is a planview, partly insection, of a furnace constructed in accordance with myinvention. Figs. 3 and 4 are detail views of the feeding device.

Throughout the drawings like reference-numerals refer to like parts.

The furnace constructed according to my invention consists in acombustion-chamber 1, the cross-section of which may be of any suitableshape, having a sole which slopes toward the flue 2. In the walls ofthis combustion-chamber I provide inlets 3 for the admission of air,which are connected to a fan 5 by wind-passage 4.

I arrange in the sole of the combustionchamber apipe 6 for feeding inthe fuel, and between the combustion-chamber 1 and the fine 2 I providea trough 7 for collecting the clinker and ashes. By means of the doors 8and 9 the trough may be emptied and the fire in the furnace kindled. Inthe feeding-pipe 6 is arranged a hopper 11,with a slide 10 for fillingthe pipe 6 with fuel, and at the end of the feeding-pipe is theapparatus for introducing the fuel into the combustion-chamber. Thisapparatus consists in a piston 12, capable of being moved to and froinside the pipe 6 and having attached to it a tube 13 for thescrew-spindle 15, which rotates in the pedestal 14. The said spindle isguided in the tube 13 by a ring 16 at its extremity. (See Fig. 1.) At-the end of the tube is a guiding-head 17, with three slide-blocks 18,operated by a ring 19 with eccentric grooves in such a manner that theblocks, the inner ends of which are provided with screw-threads, arethrown in or out of gear with the screwspindle 15.

Attached to the ring 19 is the reversing-1ever 21, provided withcounterweight 20,which lever in the two extreme positions of the pistonstrikes against oblique stops 22 and 23, respectively, whereby the ring19 is turned and the slide-block brought in or out of engagement'withthe screw-spindle.

The rotation of the screw-spindle is efifected in the following manner:The shaft of the fan 5 carries a worm 24, meshing with wormwheel 25,which actuates a connecting-rod 26. The latter imparts a reciprocatingmotion to the rod 27, provided at its extremity with a projection andsliding on the surface 28 of the bearing-block 14. The screw-spindle isfitted with a ratchet-wheel 29, which is rotated by a lever 32, providedwith pawl 30 and a roller 31, which can move on rod 27.

The projection at the end of the rod 27 striking against the end of thelever 32 brings the pawl 30 into engagement with the ratchetwheel,whereby this accomplishes a partial rotation. On the return movement ofthe rod 27 lever 32 is brought back to its initial position by a spring43, Fig. 4.

The stroke of rod 27, and consequently the amount of rotation of theratchetwheel 29 of the screw-spindle 15 and consequently the feed of thefuel, can be regulated by a setscrew 33 and hand-wheel 34, Fig. 4. Thepiston 12 is returned to its normal position by a counterweight 35, Fig.1, as soon as slideblocks 18 are by means of reversing-lever 21 thrownout of gear with screw-spindle 15.

The above-described furnace is operated as follows: The pipe 6 is filledwith fuel from the hopper 11 in such a manner that a small heap isformed above the opening of the said pipe in the combustion-chamber. Thesmall heap is covered with an easily-combustible material and thenkindled. When the fire burns properly, the fan is set to work, carebeing taken to have onlya slight blast at the start, the fan actuatingat the same time the feeding device, whereby fresh fuel is fedunderneath that which is already burning. The firing is controlled byregulating the fan and the quantity of fuel fed by means of thehereinbefore-descrioed feeding device. The slide 10 of hopper 11 isconnected to the guidinghead 17 of tube 13 in such a manner that saidslide is withdrawn and the fuel discharged into pipe 6 as soon as piston12 has on its return travel passed the opening of the hopper.

What I claim, and desire to secure by Letters Patent of the UnitedStates, is

1. In a smokeless combustion furnace in which the fresh fuel is fed fromunderneath below the layer of live fuel, the combination with acombustion-chamber, of a pipe forintroducing the fuel into said chamber,means for forcing the fuel through said pipe, a flue for drawing off thecombustion-gases and provided with a clinker-collecting trough, anair-conduit surrounding said furnace, openings in the Walls of thefurnace communicating with said conduit, and means for operating thefuel-feeding means, the sole of the combustion-chamber being formed as aplane inclined from the fuel-supply pipe toward the flue for drawing 0dthe combustion-gases, substantially as described.

2. In a smokeless combustion-furnace in which the fresh fuel is fed fromunderneath below the layer of live fuel, the combination with acombustion-chamber having a sloped sole, bf a pipe for introducingthefuel into the said chamber, a flue for drawing oi thecombustion-gases, an air-conduit surrounding the said furnace, openingsin the side of the furnace for supplying air to the burning fuel, apiston capable of moving to and fro in the feeding-pipe, a screwrotatably connected to the piston and provided at its outer end with aratchet-wheel, jaws meshing with the screw and capable of being thrownout of gear with the screw by a counterweight-lever, and means forrotating the ratchet wheel and regulating its motion, substantially asde scribed.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

CARL WEGENER.

\Vitnesses:

HENRY HASPER, WOLDEMAR HAUPT.

